Was Adrian Peterson not used properly at OU?

I see he’s taking kickoffs in Vikings practice. We saw at his pro day he can catch the ball.

So why didn’t he do that at OU? Stoops would say, its not easy getting AD open since everyone keys on him. Bull, are you telling me the D didn’t key on Reggie Bush? how about LT? The Vikings have no QB and no WRs. So I can’t assume AD will flourish there, right now. I wish Stoops would have had him return kicks more, and catch more passes.